Detect and intercept access to a file - is it possible?

[VAN0]

Hello.

Is there a way detect and intercept a file by a specific application?

What I need to do is encrypt a text file and when a specific application tries to read it I need decrypt it.

The application is running as a service so I can't use any kind of launchers for it

Any suggestions?

Thanks.

[Nessie]

You can check if the file is in use:

#Include <WinAPI.au3>

ConsoleWrite(_FileIsUses(@ScriptDir & '\My.pdf') & @CR)

Func _FileIsUses($sFile)

    Local $hFile = _WinAPI_CreateFile($sFile, 2, 2, 0)

    If $hFile Then
        _WinAPI_CloseHandle($hFile)
        Return 0
    EndIf

    Local $Error = _WinAPI_GetLastError()

    Switch $Error
        Case 32 ; ERROR_SHARING_VIOLATION
            Return 1
        Case Else
            Return SetError($Error, 0, 0)
    EndSwitch
EndFunc   ;==>_FileIsUses

And then do what you want.

Hi!